Method of forming flanges on pipes.



S. BABBITT &'C. HOUSUM. METHOD 0F PORMING FLANGES 0N PIPBS.

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1,046,1 38. Patented Dec. 3, 1912. l

sTgaTns ,PATENT oTTion.

snwann BABBITT AND cHuNowE'rHHoUsUM, or YoUNGsfrowm onto.

METHOD or romaine FLANeEs oN PIPES.

Loaaise. A

` Specicatin of 'Letters Patent.

Patented nee. e, Tais.

y Pipes, of which the following is a specification.

This invention relates to a method or process of forming flanges and collars 0n pipes, the operation being characterized by 1a fol ing down and welding togetherlof a portion of ,themetal of the pipe to secure suicicnt metal to form ianges or collars thicker. than the walls of the pipe itself.

The preferred manner of practising our will be described in connection` invention i with the accompanying drawing, in which Figure -1 shows a pipe in axial section showing it as it appears after the first step in our process; Fig. Q is an axial section, showing lthe manner in which the walls of the pipe fold upon themselves during the- Fi'g. -3- is a similar view after the action of the-die descentlof the forming die plunger.

and plunger is completed; and Fig. i shws. acompleted flange. I

The pipe 1 is first corrugated or formed with lobes as illustrated in Fig. 1; the position of thelobes or corrugations 2` depending upon the desired location of the iange or collar. For a flange they are .obviously adjacent t-he end of the pipe, as shown. The number and size of the corrugations are determined by the desired diameter and thickness of the flange, as will be apparent. The method of forming the co rugations'is immaterial and for instance dies or-rolls may be used for .this purpose. The corrugated portion of the pipe is next heated to a welding heat and placed in adie whose smaller bore 4 fits 'the pipe, corresponds to the desired diameter of the flange. Coacting 'with 4the die is a plunger 6 which fits the bore 5 of-die, andhasan eX- tension 7 fitting the bore of the pipe. The shoulder 8 of the plunger 6 may have an annular groove 9 to receive the end of the pipe and form a lip or extension l2 beyond the flange on the completed flanged pipe, or this groove may be omitted altogether. v The plunger is forced into the die under heavy pressure and vfirst acts to fold the corrugations 2 upon each other, as indicated in Fig. 2 and then to force' them together and 'cause application mea August a4@ 1911. serial No. 645,764.

BABBri'r .and

in the `mediate the ends of and whoe larger bore 5 I them to weld -into a solid. flange 11, filling tlie die, as shown in Fig. 3. Thepipe is their removed from the die and faced olf as shown in Fig. 4, or machined to any other of the well lmo'wn forms. As an alternative method vwe sometimes force the corrugations or folds 2 into contact before heating to a welding heat; afterward heating it to a welding temperature; again applying pressureto the die andv completing the welding and formation of the flange. dies,- collars may bev formed at points interthe pipe as heretofore suggested.

The claims of the 'present :application are not directedl to any machines' lor Ytools for practising the process, and as these are subject to considerable variation, wedesire to be understood to claim broadly themethod Vdenedlinthe appended claims regardless of the particular means of practising it. The process may be performed with the ordinary tools used in heavy forging work, as will be apparent, or by a suitably organized machine designed solely for this special purpose.

Having thus described the invention, what we\claim is :-'l l. The process of forming flanges or collars n pi e which consists in folding portions \of tie walls of the pipe upo-n them- 'selves :hid welding them together.

' A2. Thefprocess of forming collars or flanges' I upon pipe` which consists lin corrugating the walls of the pipe, thenl forcing the corrugations into intimate contact andwelding them together.

3. The process of forming collars or flanges on pipe which consists in forming a lobe in the walls of the lpipe, forcing the` walls of the lobe into intimate contact and welding them together.

A 4. -The'process of forming collars or flanges I on metal pipe which consists in corrugating a portion of the pipe, heating such portion of the'pipe to a welding temperature foroing the corrugations into intimate contact, and finally pressing them to finishedl form and simultaneously vwelding them together inA a die. i f

,-5. rIhe process of forming collars or flanges on metal pipe which consists in corrugating a portion of the pipe, keeping the end portions at the normal diameter; then forcing the corrugations into intimate contact and welding them together,

.By -obvious changes inthe .6. The process of forming collars or flanges' e n testimony whereoiwe have signed our on metal pipe which consists in corrugating names to this specification in the presence 10 a portion of the pipe, keepingthe end porof .two subscribing Witnesses. l

tions at the normal diameter; then forcing v SEWARD BABBITT.

5 the corrugations into intimate Contact, and CHENOWETH HOUSUM.

finally while at a Welding'temperat'ure press- Witnesses: ing them to formin a die and simultaneously J E. STAFFORD,

causing them to weld'together. l v H. fJ STAMBAUGH. 

